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Weather extremes

How extreme does Moline's weather get?

The hottest, coldest, wettest and snowiest days Moline has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 41 years of daily weather observations (1985–present), from the Rock Is L&D 15 station 4 km away. Updated through May 2026 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Moline has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
103°F Jul 17, 2006

That is about 19°F hotter than a normal July afternoon in Moline (typical high near 84°F).

The three most extreme on record

1 103°F Jul 17, 2006
2 102°F Jul 23, 2012
3 102°F Jul 25, 2012
❄️ Coldest night
-32°F Jan 31, 2019

About 45°F colder than a normal January night in Moline (typical low near 13°F).

The three most extreme on record

1 -32°F Jan 31, 2019
2 -22°F Feb 2, 1996
3 -22°F Feb 3, 1996
🌧️ Most rain in one day
6.56 in Jun 17, 1990

More rain in a single day than Moline usually gets in the whole month of June (typical June total about 5.2 in).

The three most extreme on record

1 6.56 in Jun 17, 1990
2 4.77 in Jun 30, 2014
3 4.30 in Jun 13, 2008
Most snow in one day
12.4 in Feb 1, 2015

The three most extreme on record

1 12.4 in Feb 1, 2015
2 12.0 in Jan 20, 1995
3 10.0 in Jan 27, 1996

How hot and cold it gets, month by month

The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.

-50°-30°-10°10°30°50°70°90°110°130° all-time high 103°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Moline's record heat sits well above even a hot day for the season — July's 103°F is about 19°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.

In plain terms

In a normal year, Moline's warmest days reach the mid-80s°F and its coldest nights drop to the low 10s°F. But across the record it has gone as high as 103°F and as low as −32°F. A single day has delivered over 7 inches of rain or close to 12 inches of snow. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.
Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Rock IS L&d 15 (NOAA GHCN station USC00117391), about 4 km from the city centre.

How we build these numbers →